Overview
ScreenWhite is a free web tool that displays a pure white background with a single click. It provides adjustable brightness and color temperature sliders to fine-tune the displayed shade. Additional features include a screen-wake lock to prevent the display from sleeping, and a download option that generates white images in PNG, JPG, or WEBP formats up to 8K. The page is designed for instant rendering with no flash of unstyled content. Practical uses include video call fill lighting, tracing paper backlighting, and detecting dead pixels or display uniformity issues. The service requires no sign-up, stores no user data, and offers an embeddable iframe for integration into other sites.
